What is blasphemy of the Holy Spirit? What is the unforgiveable sin, and how would I know if I’ve committed it? Hardly a week passes that I don’t have that question posed to me by someone who is spiritually tormented and living in anxiety that they have sinned in such a way that they have put themselves beyond the hope of forgiveness. What does the Bible say about this? And can we have the assurance that we have not committed blasphemy of the Spirit?